Modelling of stress-corrosion cracking by using peridynamics

Abstract

This version is available at https://strathprints.strath.ac.uk/55533/ Strathprints is designed to allow users to access the research output of the University of Strathclyde. Unless otherwise explicitly stated on the manuscript, Copyright © and Moral Rights for the papers on this site are retained by the individual authors and/or other copyright owners. Please check the manuscript for details of any other licences that may have been applied. You may not engage in further distribution of the material for any profitmaking activities or any commercial gain. You may freely distribute both the url (https://strathprints.strath.ac.uk/) and the content of this paper for research or private study, educational, or not-for-profit purposes without prior permission or charge.Any correspondence concerning this service should be sent to the ABSTRACTWe present for the first time a numerical multiphysics peridynamic framework for the modelling of adsorbedhydrogen stress-corrosion cracking (SCC), based on the adsorption-induced decohesion mechanism. The material is modelled at the microscopic scale using microstructural data. First-principle studies available in the literature are used for characterizing the process of intergranular material strength degradation. The model consists of a polycrystalline AISI 4340 high-strength low-alloy (HSLA) thin, pre-cracked steel plate subjected to a constant displacement controlled loading and exposed to an aqueous solution. Different values of stress intensity factor (SIF) are considered, and the resulting crack propagation speed and branching behaviour are found to be in good agreement with experimental results available in the literature.

Efficient Solutions for Nonlocal Diffusion Problems Via Boundary-Adapted Spectral Methods

“…Peridynamics, as a nonlocal extension of continuum mechanics [13,14], has been successful in modeling damage evolution and material failure [15,16,13]. Dynamic brittle fracture [17][18][19], fatigue and thermallyinduced cracking [20,16], fracture in porous and granular materials [21][22][23], failure of composites [24,25], corrosion damage [26][27][28][29], and stress corrosion cracking [30][31][32], are among some applications of this formulation in modeling material damage.…”

Finite element implementation of a peridynamic pitting corrosion damage model

“…Peridynamics can be applicable for different material systems including metals and composites (Oterkus and Madenci, 2012). Moreover, PD framework can be extended to other fields such as thermal (Gerstle et al, 2008), moisture , etc., so that it can be used as a single platform for multiphysics analysis of materials (Amani et al, 2016;De Meo et al, 2016;Oterkus et al, 2013;.…”

Peridynamics for Predicting Pit-to-Crack Transition

“…In the PD theory, internal forces are expressed through nonlocal interactions between pairs of material points within a continuous body, and damage is part of the constitutive model. PD theory was successfully applied for the first time by De Meo et al [7] to model stress-corrosion cracking (SCC) damage in polycrystalline materials due to hydrogen embrittlement. As an extension of that work, the present study focuses on the transition from corrosion pits to cracks due to EAF.…”